Combination lock



FIG. 1 is a perspective view of the present design.

FIG. 2 is a right elevational view of the present design.

FIG. 3 is a top plan view of the present design.

FIG. 4 is a front elevational view of the present design.

FIG. 5 is a bottom plan view of the present design.

FIG. 6 is a left elevational view of the present design; and,

FIG. 7 is a rear elevational view of the present design. 

The ornamental design for a “combination lock”, as shown and described. 